Can I add use my tablo now and a set up hdd later

I bought a complete set up not being satisfied with my current router and OTA options as is. I purchased the 4T table and a tb hdd as well as a new ac router…they will all be arriving at different times with the tablo coming 1st.
My question is can I set up /use my tablo without dvr capabilities of course and then add my hdd later?

Yes. Just you can use only one tuner at a time. HDD is needed for 4 tuner support.